CHICAGO—Cubs owner Tom Ricketts told the Chicago Tribune that he’s found a new way to bring in revenue to the second highest payroll in Major League Baseball. Instead of fighting for ad space in and around historic Wrigley Field, Ricketts says he can help lessen the effect of declining attendance through walking billboards. “The ushers have always been a part of the unique ‘Friendly Confines’ experience,” a spokesman for the Ricketts family told The Flipside. “Now, they’ll play an even